|About this Abstract
||2020 TMS Annual Meeting & Exhibition
||High Entropy Alloys VIII
||Deformation Mechanisms of Two Stable Face Centered Cubic High Entropy Alloys at Cryogenic Temperature
||Feng He, Shaolou Wei, Zhijun Wang, C. Cem Tasan
|On-Site Speaker (Planned)
High strain hardening rate plays a key role in enabling face centered cubic (FCC) HEAs to have excellent ductility, high fracture toughness, and good ultimate tensile strength. Decreasing temperature usually further enhances the strain hardening capacity of FCC HEAs, resulting in enhanced tensile strength and ductility. However, the strain hardening mechanism of FCC HEAs at cryogenic temperature has not been fully understood. In the current work, we investigated the deformation mechanisms of two FCC HEAs with different stacking fault energies at cryogenic temperature. In-situ sychotron XRD tesnile test indicated that the stacking fault energy greatly affect strain hardening behaviors of FCC HEAs. Transimisson electron microscope (TEM) results demonstrated that it is dislocation slip mode, instead of deformation twining, that mainly affects the strain hardning capacities of the investigated two HEAs. The origins of this observation were systematically studied and will be presented in this talk.
||Planned: Supplemental Proceedings volume; Planned: Supplemental Proceedings volume